Hook



Aug. 3 1926.

1594;844 A. R. M'ZARTHUR ET AL 7 BOOK v Filed April 1, 1926 3 SheetsSheet 1 and $50 /-7 P041 7" Fdtiaesses: fnvend'omsv' T ETHUE ET Nfierwue Aug. 3 1926. 1,594Qs44 A. R. MCARTHUR ET AL noox Filed April 1,1926 3 sheets-sheet 2 0' Witnesses:

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' Aug. 3 1926. 1,594,844

A. R. MOARTHUR ET AL HOOK Filed April 1, 1926 3 Sheets-Sheet 3 Vwnesses:v l7wenforsi and FEED F. Pouz. v I n Aug. 3, 1925..

hairs v insane rant W ARTHUR lilcifitltTi-llliflijkl ll) FEED F. POLK,OE GARY, INDIANA ASSIGNORS TOAMLERI- CAN SHEET AND 'ELZN PLATE. COMPANY,OF PITTSBURGH PENNSYLVANIA, A (303- PORATION O33 HEX- T HOOK.

Application filedAprili 1, 1926. serial noxaao'os.

This invention relates to carrying hooks and more particularlytocarrying hooks particularly adapted for carryingtin plate and thelike, and has for its object the provision of a hook of this classhaving a novel form of operating mechanism adapt ed to operate the hookmembers.

Another object of this invention is to provide a hook of the classdescribed having the novel construction, design and combination of partshereinafter described and illustrated in the accompanying drawings.

In the drawings:

Figure l is a side elevation of a hook constructed inaccordance withthis invention.

Figure 2 is atop plan thereof.

Figure 3 is an end elevation thereof.

Figure 41 is a fragmentary side elevation of the upper portion of a hookembodying this invention, with part of the carrying frame broken awayfor the sakeof clearness.

Figure 5 is a fragmentary view showing the operating" cams in engagementwith the lever arms of the hooks.

Referring more particularly to the drawings, the letter A designates thecarrying frame of the hook mechanism as a whole which frame is composedof a pair of side bars 2 and end axle members 3 secured thereto.

Crank-shaped hook members 4 are pivotally mounted at their crank points,as at at, on the axles 3 at each corner of the frame A. The hookmembersl each have one arm extending inwardly parallel with the sidebars 2 and formingan operating lever arm, while the other arm 6 of eachof the hook members extends downwardly forming article engaging armswhich terminate in hooked ends 7.

The lever arms 5 0f the members 4, suspended from the opposite cornersof the same side of the frame A, have their inner ends overlapped andone of the arms 5 is provided with a slot 8 to receive a pivot pin 9carried by the other arm 5 so as to form a pivotal and slidingconnection be tween the lever arms 5 of the pairs of members 4 on eachside of the frame A.

The side rods 2 are each provided with a hearing lug l0 intermediatetheir ends in which a shaft 10 is journaled. The shaft 10 has a pair ofcams 11 secured thereon and positioned to engage and depress theconnected lever arms 50f the members at.

A pair of canrstop members 12ers eecured on the shaft 10 andprovidectwith projections 13 adapted to engage stopblo lrs' 14 on theside bars 2 to pre' t the rotation of the cams 11 beyond their highestpoint. p

The shaft lO is provided with handwheels- 15 at each end to provide formanual rotation thereof. i

A. suspension member or carriage composed of a crane hook plate 16 andsubstantially Ell-shaped carrier arms '17, isconnected to the lever arms5 of the hook members l by links 18 which are pivotally connected to theend'sof the carrier arms 17 and to points intermediate the ends of thelever arms 5. i

In operation thehand-wheels 15 will be rotated to rotate the shaft 10and cams 11 so as to force the'cams 11 todepress the lever arms 5 andthereby rock the hook members 4 about their pivotal connections l on theaxles 3, and swingthe article engaging arms 6 outwardly sufficiently toclear the platesor'sheets to belifte'dl The hook will thenbe lowered"over thesheets or plates to be lifted, and the 'sha'ft'lOwill bereversely rotated to" move the" cams 131 in the reverse direction andpermit the arms 6 to swinginwardly toward the sheets so that thehookmembers 7 will engage under the sheets.

The stop members 12 and 13 will cooperate to prevent the moving of thecams ll beyond their highest point and thereby prevent the arms6dropping against the material being lifted.

VVhi'le. we have shown and described one specific embodiment of ourinvention, it will be understood that we do not wish to be limitedthereto since various modifications may be made without departing fromthe scope of our invention as defined in the appended claims.

We claim:

1. A carrying hook mechanism, compris ing a substantially rectangularframe. a shaft extending transversely of and journaled in said frameintermediate the ends thereof crank-shaped hook member pivotallysuspended from each corner of said frame, said hook members having onearm extendinginwardly parallel with the side members meats-e tendingdownwardly and terminating in a.

hook portion, said hook members on the respective sides of said framehaving their lever arms connected together by combined sliding andpivotal connection, and means on saidv shaft adapted to depress saidlever arms when said shaft is rotated to swing. said article engagingarms outwardly to clear the articles to be lifted.

2. A carrying hook mechanism, comprising a substantially rectangularframe, a shaft extending transversely of and jeurnaled in said frameintermediate the ends there of, crank-shaped hook members pivotallysuspended from each corner of said frame, said hook members having onearm extending inwardly parallel with the side members of said frame toform operating lever arms and their other or article engaging armextending downwardly and terminating in a hook portion, said ,hookmembers on the respective sides of said frame having their lever armsconnected together by a combined sliding and pivotal connection, asuspension member adapted to be engaged by a crane hook. said memberhaving a link connection with each of said lever arms intermediate theirends, and means on said shaft adapted to depress said lever arms toswing said article engaging arms outwardly to clear the articles to belifted.

3. A carrying hook mechanism, comprising a substantially rectangularframe, a shaftextending transversely of and ournaled in said frameintermediate the ends thereof, crank-shaped hook members pivotallysuspended from each corner of said frame, said hook members having onearm extending inwardly parallel with the side members of said frame toform operating lever arms and their other or article engagin armextending downwardly and terminating in hook portion. said hook memberson the respective sides of said frame having their lever arms connectedtogether by a combined sliding and pivotal connection, a suspensionmeniber adapted to be engaged by a crane hook, said member having a linkconnection with each of said lever arms intermediate their ends, andcams on said shaft adapted to engage and depress said lever arms toswing said article engaging arms outwardly to clear the article to belifted.

4. A carrying hook mechanism, comprising a substantially rectangularframe, a shaft extending transversely of and journaled in said frameintermediate the ends thereof,crank-shaped hook members pivotallysuspended from each corner of said frame, said hook members having onearm extend ing inwardly parallel with the side members of said frame toform operating lever arms and their otheror article engaging armextending downwardly and terminating in a hook portion, said hookmembers on the respective sides of said frame having their lever armsconnected together by a combined sliding and pivotal connection, asuspension member adapted to be engaged. by a crane hook, said memberhaving a link connection with each of said lever arms intermediate theirends, cams on said shaft adapted to engage and depress said lever armsto swing said article engaging arms outwardly to clear the article to belifted, and stops on said frame adapted to limit the movement of saidshaft and cams.

5. A carrying hook mechanism, comprising a substantially rectangularframe, a shaft extending transversely of and journaled in said frameintermediate the ends there of, crank-shaped hook members pivotal'lysuspended from each corner of said frame, said hook members having onearm extending inwardly parallel with the side members of said frame toform operating lever arms and their other or article engaging armextending downwardly and terminating in a hoop portion, a suspensionmember adapted to be engaged by a crane hook, said member having a linkconnection with each of said lever arms intermediate their ends, andmeans on said shaft adapted to depress said lever arms to swing saidarticle engaging arms outwardly to clear the articles to be lifted. c

r In testimony whereof, we have hereunto set our hands. V

ARTHUR R. MCARTHUR. FRED F, POLK.

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